/*
 * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <debug.h>
#include <oem_svc.h>
#include <platform.h>
#include <runtime_svc.h>
#include <stdint.h>
#include <uuid.h>

/* OEM Service UUID */
DEFINE_SVC_UUID(oem_svc_uid,
        0xb943add0, 0x069d, 0x11e4, 0x91, 0x91,
        0x08, 0x00, 0x20, 0x0c, 0x9a, 0x66);


/* Setup OEM Services */
static int32_t oem_svc_setup(void)
{
    /*
     * Invoke related module setup from here
     */

    return 0;
}

/*******************************************************************************
 * OEM top level handler for servicing SMCs.
 ******************************************************************************/
uint64_t oem_smc_handler(uint32_t smc_fid,
            uint64_t x1,
            uint64_t x2,
            uint64_t x3,
            uint64_t x4,
            void *cookie,
            void *handle,
            uint64_t flags)
{
    uint64_t rc;

    switch (smc_fid) {
    default:
        rc = SMC_UNK;
        WARN("Unimplemented OEM Call: 0x%x\n", smc_fid);
    }

    SMC_RET1(handle, rc);
}

/*
 * Top-level OEM Service SMC handler. This handler will in turn dispatch
 * calls to related SMC handler
 */
uint64_t oem_svc_smc_handler(uint32_t smc_fid,
             uint64_t x1,
             uint64_t x2,
             uint64_t x3,
             uint64_t x4,
             void *cookie,
             void *handle,
             uint64_t flags)
{
    /*
     * Dispatch OEM calls to OEM Common handler and return its return value
     */
    if (is_oem_fid(smc_fid)) {
        return oem_smc_handler(smc_fid, x1, x2, x3, x4, cookie,
                    handle, flags);
    }

    switch (smc_fid) {
    case OEM_SVC_CALL_COUNT:
        /*
         * Return the number of OEM Service Calls.
         */
        SMC_RET1(handle, OEM_SVC_NUM_CALLS);

    case OEM_SVC_UID:
        /* Return UID to the caller */
        SMC_UUID_RET(handle, oem_svc_uid);

    case OEM_SVC_VERSION:
        /* Return the version of current implementation */
        SMC_RET2(handle, OEM_VERSION_MAJOR, OEM_VERSION_MINOR);

    default:
        WARN("Unimplemented OEM Service Call: 0x%x\n", smc_fid);
        SMC_RET1(handle, SMC_UNK);
    }
}

/* Register OEM Service Calls as runtime service */
DECLARE_RT_SVC(
        oem_svc,
        OEN_OEM_START,
        OEN_OEM_END,
        SMC_TYPE_FAST,
        oem_svc_setup,
        oem_svc_smc_handler
);
